so you can use one EVT\_MENU macro for both a menu item and a toolbar button.
The event handler functions take a wxCommandEvent argument. For most event macros,
the identifier of the tool is passed, but for EVT\_TOOL\_ENTER the toolbar
so you can use one EVT\_MENU macro for both a menu item and a toolbar button.
The event handler functions take a wxCommandEvent argument. For most event macros,
the identifier of the tool is passed, but for EVT\_TOOL\_ENTER the toolbar